CN101582508A - Three-dimensional hydrophilic porous structure for fuel cell plate - Google Patents
Three-dimensional hydrophilic porous structure for fuel cell plate Download PDFInfo
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- CN101582508A CN101582508A CNA2008102147626A CN200810214762A CN101582508A CN 101582508 A CN101582508 A CN 101582508A CN A2008102147626 A CNA2008102147626 A CN A2008102147626A CN 200810214762 A CN200810214762 A CN 200810214762A CN 101582508 A CN101582508 A CN 101582508A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The present invention relates to a three-dimensional hydrophilic porous structure for a fuel cell plate, and an execution scheme comprises a three-dimensional hydrophilic porous structure for a fuel cell collector plate.
Description
The application requires the U.S. Provisional Application No.60/939 of submission on May 23rd, 2007,678 rights and interests.
Technical field
The general related field of the disclosure comprises the fuel cell component that comprises three-dimensional hydrophilic porous structure that is used for the solid fuel cell panel.
Background technology
Known fuel comprises collector plate (collector plate) as bipolar or unipolar plate, and it is used to collect the electronics that is produced by the fuel cell consume fuel, and by reactant gas flow field transfer the fuel cell reaction gas.These reactant gas flow field are limited by one or more passages, and described passage forms through machine work, punching press, etching, die casting or other method in the solid substrate of being made by metal or composite material usually.The contiguous usually dispersive medium material of collector plate provides, and described dispersive medium material is generally porous material such as carbon paper.Replacedly, in some configuration, collector plate can directly contact with catalysis electrode.Randomly, microporous layers can be positioned under the gas diffusion media layer, and catalysis electrode can be positioned under microporous layers or the gas diffusion media layer.Polyelectrolyte membranes below first catalysis electrode, second catalysis electrode be positioned at second of polyelectrolyte membranes below.Second microporous layers can be positioned under second catalysis electrode, and second gas diffusion media layer is positioned under second microporous layers or second catalysis electrode.Second collector plate is positioned under second gas diffusion media layer.Second collector plate also comprises the reactant gas flow field that is limited by a plurality of passages and platform (land).These platforms carry out physics with gas diffusion media layer and contact.
For the ease of the water treatment in the fuel cell, wish on bipolar plate surfaces, to introduce hydrophily.Handling bipolar plate surfaces can realize by making initial water contact angle be no more than 15 ° (Superhydrophilics) to introduce surface hydrophilicity; And has durability so that water contact angle is enough stable and can be above 15 ° in the whole life-span of fuel cell; And the contact resistance that hydrophilic treated can influence plate sharply makes it exceed acceptable level.
So far, silica dioxide coating has been used to optionally introduce water-wet behavior to the part of bipolar plates.Yet, this and other be faced with following problem based on organic hydrophilic coating: in the adhesiveness of the difference on substrate such as the stainless steel (no matter under wet condition of still doing); Pollute, this is owing to be easy to by the high surface energy on the Superhydrophilic surface of less hydrophilic contaminants; Dissolving, wherein silicon dioxide can be by being dissolved in the fuel cell environment with membrane degradation accessory substance such as HF reaction; Heat ageing (thermal degradation), its floating coat if any organic coating along with being exposed to 90 ° and above temperature repeatedly and through doing and wet circulation (causing the hydrophilic radical reorientation on the described coating upper surface) and wearing out repeatedly, thereby, reduced its hydrophily; Electrochemical Ageing, wherein some hydrophilic radical can be activated by electrochemistry in the displacement environment (substitutionenvironment) of fuel cell and be aging.
Summary of the invention
A kind of embodiment of the present invention comprises product, and it comprises the fuel cell collector plate (fuel cell collector plate) with the reactant gas flow field that is limited by a plurality of passages and platform; And the three-dimensional porous hydrophilic-structure (three-dimensional porous hydrophilic structure) of filling described passage basically.
Other exemplary embodiment of the present invention will become obvious by the detailed description that provides below.Should be appreciated that the detailed description and the specific embodiment that disclose exemplary embodiment of the present invention just are used for illustrative purposes, rather than be intended to limit the scope of the invention.
Description of drawings
By detailed description also in conjunction with the accompanying drawings, exemplary embodiment of the present invention will become and more fully be understood, wherein:
Fig. 1 has shown the method according to a kind of embodiment of the present invention.
Fig. 2 has shown the product according to a kind of embodiment of the present invention.
Embodiment
Being described in of following embodiment is example in essence, and will limit the present invention, its application or purposes anything but.
One embodiment of the invention comprise introduces hydrophilic method in bipolar or unipolar plate flow channel.Three-dimensional porous hydrophilic-structure places or is formed at the collector plate flow channel.Three-dimensional structure has the loose structure of interconnection.The porosity of three-dimensional structure can provide by the method that produces hole, and described method includes but not limited to, produces the living hole or the blowing agent of the open cell structure (open cell structure) of porous.Pore generating agent can be any material that can be sacrificed or remove subsequently, and described sacrifice or removal perhaps flow out it by the heating pore generating agent and carry out by etching, dissolving from three-dimensional structure.The blowing agent that is fit to comprises that those skilled in the art become known for any blowing agent of polymer, pottery or metal material.
Referring to Fig. 1, one embodiment of the invention comprise provides fuel cell collector plate 10, and it has by a plurality of passages 12 and platform 14 and is limited to wherein reactant gas flow field.Passage 12 can be formed in the substrate 16, and substrate 16 can be formed by composite material or metal such as stainless steel, aluminium, titanium or other alloy.Can in substrate 16, carry out machine work, punching press, etching or die casting and form passage 12.Passage 12 can be filled and can be formed solid-state material and pore generating agent or blowing agent.Material is being formed in the solid-state process, blowing agent produces loose structure in the solid that forms.Replacedly, when forming solid, pore generating agent can make it become liquid and make to flow out in the three-dimensional structure of this liquid from be retained in collector plate passage 12 by dissolving, etching or heating pore generating agent subsequently and remove.In one embodiment, passage 12 is filled with first material 18, and described first material can comprise monomer, crosslinking agent and pore generating agent.Described monomer in second step for example by the heating or be exposed to the UV photocuring, so that the 18c of the curing materials with pore generating agent to be provided.After this, remove pore generating agent, thereby in passage 12, obtain crosslinked three-dimensional porous structure 18d.Be chosen in the monomer that has water-wet behavior when solidifying, so that three-dimensional porous structure is hydrophilic.Replacedly, can use the step of the three-dimensional structure in the extra chemical modification passage 12, in three-dimensional structure, to introduce hydrophily.
In another embodiment of the present invention, three-dimensional hydrophilic porous structure can use to have the mould identical with the geometry of flow channel 12 in the fuel cell collector plate 10 and makes elsewhere.In addition, loose structure can be made by various other materials, includes but not limited to metal and pottery.Preferably, the material selected for use of three-dimensional structure is the chemistry tolerance to the environment of fuel cell.Any polymer to the HF tolerance all is preferred.In addition because the material in the passage 12 is three-dimensional, so overcome with bipolar plate surfaces on the relevant problem of adhesion of two-dimentional coating.
This three-dimensional porous structure is not a gas diffusion media layer.Gas diffusion media layer is the carbon fiber of carbon paper or felt form normally.
Referring now to Fig. 2,, another embodiment of the present invention comprises product 10c, for example fuel cell or fuel cell pack, has the first bipolar plates 16c, described first bipolar plates has the reactant gas flow field that is limited by a plurality of platform 14c and passage 12c, has crosslinked three-dimensional porous structure 18d in passage 12c.The first gas diffusion media layer 20c can be positioned under the first bipolar plates 16c.The first gas diffusion media layer 20c can comprise the carbon fiber of a plurality of carbon papers or carbon felt form.Microporous layers 22c can be positioned under the first gas diffusion media layer 20c.Microporous layers 22c preferably is coated in the first gas diffusion media layer 20c upward also can comprise a large amount of carbon granules in the polytetrafluoroethylene binding agent.Negative electrode 24c can be positioned under the first microporous layers 22c.Negative electrode 24c can comprise that catalyst is as loading on the platinum on a large amount of carbon granules and comprising ionomer such as NAFION.Polyelectrolyte membranes 26 can be positioned under the negative electrode 24c.Polyelectrolyte membranes 26 can be formed by ionomer such as NAFION, and can be supported by the expanded polytetrafluoroethyl, ne sheet if desired.Anode layer 24a can be positioned under the polyelectrolyte membranes 26 and can construct similarly with cathode layer 24c.The second microporous layers 22a can be positioned under the anode layer 24a.The second gas diffusion media layer 20a can be positioned under the second microporous layers 22a.The second bipolar flaggy 16a has the reactant gas flow field that is limited by a plurality of platform 14a and passage 12a, has crosslinked three-dimensional porous structure 18d in passage 12a.
More than to the just example that is described in essence of embodiment of the present invention, so its variation should not be counted as the disengaging the spirit and scope of the present invention.
Claims (18)
1, product comprises:
Fuel battery double plates is limited with reactant gas flow field in the one side at least at it, and described reactant gas flow field is limited by a plurality of platforms and passage; Basically fill the three-dimensional hydrophilic structure of at least one passage.
2, product comprises:
Fuel cell collector plate wherein is limited with reactant gas flow field, and described reactant gas flow field is limited by a plurality of platforms and the passage in the face that is formed at described collector plate; Basically the three-dimensional porous structure of filling channel; With the hydrophilic coating at least a portion of described three-dimensional structure.
3, according to the product of claim 2, wherein said three-dimensional structure comprises polymer.
4, according to the product of claim 2, wherein said three-dimensional structure comprises ceramic material.
5, according to the product of claim 2, wherein said three-dimensional structure comprises metal.
6, method comprises:
Fuel battery double plates is provided, is limited with reactant gas flow field in first of described fuel battery double plates, described reactant gas flow field is limited by a plurality of platforms and passage at least in part;
Fill described passage with first material, described first material can be cured, and described first material comprises the device that forms the hole; And
Make described first material form solid-state three-dimensional porous structure.
7, according to the method for claim 6, wherein said three-dimensional solid-state structure is hydrophilic.
8,, also comprise and handle described three-dimensional porous structure to introduce hydrophily according to the method for claim 6.
9,, also be included at least a portion of described three-dimensional porous structure and form hydrophilic coating according to the method for claim 6.
10, according to the method for claim 6, wherein said first material comprises monomer and crosslinking agent.
11, according to the method for claim 6, wherein said first material comprises prepolymer.
12, according to the method for claim 6, wherein said first material comprises pottery.
13, according to the method for claim 6, wherein said first material comprises metal.
14, method comprises:
Fuel battery double plates is provided, has reactant gas flow field in first of described fuel battery double plates, described reactant gas flow field comprises a plurality of platforms and passage; And
The porous three-dimensional structure is placed into and fills basically described passage.
15, according to the method for claim 14, wherein said three-dimensional porous structure is hydrophilic.
16,, also comprise and handle described three-dimensional porous structure to introduce hydrophily according to the method for claim 14.
17,, also comprise and use hydrophilic coating to apply at least a portion of described three-dimensional porous structure according to the method for claim 14.
18, product comprises:
First fuel battery double plates is formed with reactant gas flow field in its at least the first, described reactant gas flow field is limited by a plurality of at least platforms and passage; With the three-dimensional porous hydrophilic-structure in one of described passage, and wherein said three-dimensional porous hydrophilic-structure is filled one of described passage basically;
Be positioned at first gas diffusion media layer under described first bipolar plates, be positioned at first catalysis electrode under described first gas diffusion media layer, be positioned at the polyelectrolyte film under described first catalysis electrode, be positioned at second catalysis electrode under the described polyelectrolyte film, be positioned at second gas diffusion media layer under described second catalysis electrode, and be positioned at second bipolar plates under described second gas diffusion media layer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/119,647 | 2008-05-13 | ||
| US12/119,647 US8383291B2 (en) | 2007-05-23 | 2008-05-13 | Three-dimensional hydrophilic porous structures for fuel cell plates |
| US12/119647 | 2008-05-13 |
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| Publication Number | Publication Date |
|---|---|
| CN101582508A true CN101582508A (en) | 2009-11-18 |
| CN101582508B CN101582508B (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102147626A Expired - Fee Related CN101582508B (en) | 2008-05-13 | 2008-08-22 | Three-dimensional hydrophilic porous structure for fuel cell plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109950597A (en) * | 2019-04-04 | 2019-06-28 | 深圳市致远动力科技有限公司 | A kind of full solid thin film fuel cell and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10232129A1 (en) * | 2002-07-11 | 2004-02-05 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Fluid distribution device and method for manufacturing a fluid distribution device |
| WO2008079126A1 (en) * | 2006-12-22 | 2008-07-03 | Utc Power Corporation | Liquid electrolyte fuel cell having high permeability wicking to return condensed electrolyte |
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- 2008-08-22 CN CN2008102147626A patent/CN101582508B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109950597A (en) * | 2019-04-04 | 2019-06-28 | 深圳市致远动力科技有限公司 | A kind of full solid thin film fuel cell and preparation method thereof |
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| CN101582508B (en) | 2012-09-19 |
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